Hi Megan, I have children from 5 to 33 years old. My worry was for the younger children still at school and their peer group reactions.
My 14/15 year old lives in Phuket with my wife, a french lady. She kinda already had an idea I was like, as she said, Bruce/Caitlyn Jenner. That her friends were not in the dinasaur age . So that was that. She is now very proud of me. But it is Thailand.
My 5 year old daughter lives with her mother, a Singaporean. Well she couldnt care less, she still calls me dad. When I first told her she just giggled. Her teacher, I can tell, was initially suprised. I had a chat with her and she was a very progressive thinker. I was the first tg she met. She assured me she would be watching for any issues. None has happened.
Keep it light and not serious, you have not done anything wrong, and its ok to be female or male. What an age to learn to accept that some people need change. This is what the Thai children learn at an early
age.You will always be their dad, you can ask them to call you sonething else but not mother, if she still has one.